000 00286nam a2200121Ia 4500
008 200906s9999 xx 000 0 und d
082 _a517.38 N425
100 _aNELSON.A.L
245 0 _aDIFFERENTIAL EQUATIONS
260 _bHEATH AND CO, BOSTON
_c1952
300 _a23X15
942 _cBK
999 _c61138
_d61138